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"Since search engines keep different metrics for domains than they do subdomains, it is recommended that webmasters place link-worthy content like blogs in subfolders rather than subdomains. (i.e. www.example.com/blog/ rather than blog.example.com) The notable exceptions to this are language-specific websites. (i.e., en.example.com for the English version of the website)."

I am wondering if this is still Moz's current recommendation on the subfolders vs subdomains debate, given that the above (sort of) implies that SE's may not combine ranking factors to the domain as a whole if subdomains are used - which (sort of) contradicts Matt Cutts last video on the matter ( http://www.youtube.com/watch?v=_MswMYk05tk ) which implies that this is not the case and there is so little difference that their recommendation is to use whatever is easiest. It would also seem to me that if you were looking through the eyes of Google, it would be silly to treat them differently if there were no difference at all other than subdomain vs subfolder as one of the main reasons a user would use a sud-domain is a technical on for which it would not make sense for Google to treat differently in terms of its algorithm.

I notice that in terms of Moz, while most of the site uses subfolders, you do have http://devblog.moz.com/ - and I was wondering if this is due to a technical reason or conscious decision, as it would seem to me that the content within this section is indeed linkworthy (as it has external links pointing to it from external sources), therefore it would seem to not be following the initial advice that is posted in Moz's basics on domains. Therefore I am assuming it is due to a technical reason - or that Moz's adive is out of date with current Moz thinking, and is indeed in line with Matt C in that it doesn't matter.

5 Responses

Hi James - I would still strongly urge folks to keep all content on a single subdomain. We recently were able to test this using a subdomain on Moz itself (when moving our beginner's guide to SEO from guides.moz.com to the current URL http://moz.com/beginners-guide-to-seo). The results were astounding - rankings rose dramatically across the board for every keyword we tracked to the pages.

I've had the opportunity to see many dozens of other sites do the same, almost always with similarly positive results (assuming they're moving from a subdomain without much other content/link signals to the subdomain that has those signals).

I think the important word you used in describing Matt's video is "implied." He's very careful not to speak in specifics, and often, I think the truth is buried in that non-specific language, rather than in the broader implied phrasing. That said, I do agree with you that after all these years, it seems odd that Google is still behaving in this fashion and that moving from one subdomain to another can have such a dramaticly positive impact on rankings.

p.s. Yes, for devblog, we put it there due to technical limitations. We plan to eventually get it moved to the main site.

Yep, had a similar case when we moved a clients blog from blog.domain.com to domain.com/blog. Not only did rankings for blog terms increase, so did the rankings for the pages on the main site. Glad to see this holds true in other scenarios.

I'm glad I stuck to my guns when clients asked whether they should move. I was skeptical after MC released that video that basically said there is no difference.. but you need to read between the lines. He would make a great politician haha.

When you talk about rankings rising, did you see them rise for the KW's associated with http://moz.com/beginners-guide-to-seo or are we talking about rankings for other Moz pages ? - IE did adding http://moz.com/beginners-guide-to-seo contribute to a rise in rankings across the whole domain or just that subfolder.

I hope you consider making this into one of your WBF's / Posts, as I think it would be fascinating to see the "What you did", "What were the results" etc, and also get feedback from what others have experienced.

We only measured rankings on the pages inside the guide, but didn't look broadly across the entire moz.com domain. I think that would have been much harder to observe since there's so many things that can affect it.

Thanks for the nudge on the WB Friday - will consider that for the future!

With my company, which has several major domain sites and a mother-ship root domain, we've had this ongoing discuss of moving all our subdomains to subfolders. Our concern is the pain of the transition in losing valuable traffic until the subfolders gain value and traffic. So we have the following subdomains:

boatcovers.iboats.com

boatpropellers.iboats.com

biminitops.iboats.com

forums.iboats.com

And all our other products are listed under iboats.com. Is there a painless way of making the switch to move our subdomains into subfolders and not get killed on traffic?

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